Friction means for window-shade rollers



Nov. 13, 1928. 1,691,463

H. R. BREWER FRICTION MEANS FOR WINDOW SHADE ROLLERS Filed March 1, 1926 ATTORNEY.

Patented Nov. 13, 1923 entree srarss" rATENfTT O FFICE.-

HUGH R. BREWER. OF VIICHITA, KANSAS.

FRICTION MEANS FOR \K INDOXV-SHADE ROLLERS.

Application fried March 1, 1928. Serial No. 91,486.

My invention relates to a friction means for window shade rollers.

T he object of my invention to manipu late the raising and loweii of the shade by other means than taking hold of the shade. g

A further object of my invention is to eliminate the use of a spring in the roller.

A still further object of my invention is 0 to provide a centering means for the trunnion.

A still further object of my invention is to provide a brackethaving a detent to prevent the rotation of the friction means with the roller.

These and other objects will hereii'iafter be more fully explained.

Referring to the drawings:

The following views are directed by the arrows shown on the drawings:

Fig. l is a plan View of a shade roller with the invention installed.

Fig. 2 is a sectional View taken along the line IIII in Fig. 1.

Fig. 3 is a sectional view taken along line III in Fig. 1.

t is a front view of the shade at- Fig. 5 is a grooved friction thimble. 5 1g. {5 is a pin functioning as a trunnion. Fig. "4" 1s a plan view of the friction shoe.

1 1g. 8 is a plan view of the bracket. g. 9 is aside view of the friction shoe r en along line XHXII in Fig. 7.

Fr 10 is a sectional view. taken along the line iIYlIi-XHI 1n Figures 7 and 12.

are

Eetcrrmg to th drawings in detail, 1. is.

sitioned in the thimble is an anerture'adapted to receive the pin 9 which isdriven into he an annular knurled groove 5 on theheei d f the roller until the collar 10 con- The outward extending iV-rtion of the pin as at C functions as a ."unnion for the roller. I have provided a 'iction shoe 11 which is concaved and adapted to engage on the flange and rib acent the groove'on the thimble for the thimble.

purpose hereinafter described.

The shoe consists of two concaved arouated members D and E respectively; the said members being connected by a loop F functioning as a spring and simultaneously as a hanger to prevent rotation with the roller. The opposite ends of the members D and E are curved outward as at G as ineans'to prevent wear on a cord 12;. the said cord engaging in the knurled. groove 5 and held firmly to engagement therein by means of the shoe above described.

l Vhen the thimble is placed on the end of the roller and the pin driven to axial engagement with the roller it is trunnioned in bracket 13 which is rigidly attached to the casing of the window or opening over which the shade functions; the said bracket having anaperture to receive the outer end ofthe pin. Rearwardly and laterally extending from the bracket is a detent member 15; the said member adapted to engage in the loop F by which means the tension of the shoe will prevent the roller from turning Under the weight'of the shade, and the cord 12 heretofore described is means for revolving the roller both ways for raising and lowering the shade. The predetermined position of the shade is'maintained by the friction of the shoe on the flange 6 and the rib 7.

It will be understood that the oppositeend of the roller will be equipped with a pin aXiall and trunnioned in a bracket (said bracliet not being shown).

Such modifications may be employed as i lie within the scope of the appended claim. Having thus described my invention, what I claim as new and desire to secure by. Let ters Patent is g In a friction means for window shade rollers 21 thimble comprising an annular groove, a flange and a rib adjacent the sides of the said groove, two concaved shoe segments integrally connected by a rectangularly shaped loop to function as a sprlng tensioning means for the segments and as means to engage With a detent to prevent.

rotation, said shoe segments tensionecl and frictionally engaging with said flange and rib as braking means for the roller, a pin centrally positioned in the thiinble, a bracket having a laterally extending detent, the pin trunnioned in the bracket, the detent engaging in the rectangular spring member HUGH R. BREWER. 

